Pile-driver.



No. 628,962. Patented July l8, 1899.

A. C. SPEER.

PILE DRIVER.

(Application filed May 25, 1897.) (No Model.) 2 sh et -Sheet. I,

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ABRAM C. SPEER, OF OODVILLE, OREGON.

PlLE-DRIVER.

$PEQIFICATION forming part of Letters Patent No. 628,962, dated July 18, 1899..

Application filed May 25, 1897. Serial No. 638,089. (No model.) I

T at whom itwuty concern.-

Be it known that I, ABRAM G. SPEER, of VVoodville, in the county of Jackson and State of Oregon, have invented ,eertain new and useful Improvements in Pile-Drivers; and I do hereby declarethe following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same,

This invention relates to pile-drivers; and it consists, essentially, of a weight or drop having a rack-bar attached thereto with which adjustable mechanisms coact to raise and release the said rack-bar and the weight or drop attached thereto.

The invention further consists of the details of construction and arrangement of the several parts, which will be more fully hereinafter described and claimed.

The object of the invention is to dispense with the ordinary form of lifting and operat ing a weight or. drop to drive piles and to provide a device of this character having a positive operation and one wherein the parts are strong and durable, easily and readily operated,and comparatively inexpensive in the cost of manufacture.

In the accompanying drawings, Figure 1 is a perspective View of a pile-driver embodying the invention. of the upperadjusting and operating mechanism shown on an enlarged scale. Fig. 3 is a section on the line 00 :0, Fig. 1. Fig. 4: is a side elevation of the improved pile-driver. Fig. 5 is a front elevation of the same. Fig. 6 is a section on the line y y, Fig. 5.

Referring to the drawings, wherein similar numerals of reference are employed to indicate corresponding parts in the several views, the numeral 1 designates a rearwardly-extending base-piece having lateral projections 2 at its outer end. Rising from the outer end of the base-piece 1 and the projections 2 and inclosinga recess 3 isa pair of guides 4E,which are longitudinally slotted and held in position by brace-beams 5, secured to the outer parts of the lateral projections 2 and the up per parts of the said guides. The said guides are preferably made of two beams, which are spaced apart and held in position by the said braces 5, whose upper ends are beveled and Fig. 2 is a similar viewformed with tenons of a width equal to the slots in the said guides, and over the top of the latter is mounted a cap 6, having a slot 7 extending therethrough and an antifrictional roller 8, adjacent to said slot, supported in suitable bearings 9. Between the guides 4a weight or drop 10 is mounted and has lateral projections 11 freely movable in the guides, and to the upper part of the said drop or weight the lower end of a rack-bar 12 is removably se'cured.' The said rack-bar extends upwardly through the slot 7 in the cap 6 and bears against the antifrictional roller 8. Rising from the base-piece 1 and extending inwardly at an incline to the upper portions of the guides 4 is a ladder13, by which ascent maybe made to the cap 6 to rearrange or otherwise manipulate the mechanism located thereon; On the lower inner portion of the said ladder 13 are journals 15, in which a shaft 16 is rotatably mounted, having on the outer end thereof a sprocket-wheel 17, adapted to be operated by manual or applied power from a steam-engine or other source, and thereover runs a chain belt 18, which also passes up and embraces a similar sprocketwheel 19, mounted on the end of a shaft 20, carried bya pair of slides 21, transversely arranged thereto and movable in guides 22. On the said shaft 20 is a pinion 23, which is adapted to engage the teeth of the rack-bar 12in elevating. the'weight or drop 10.. The said slides 21, adjacent to their inner ends, have arched-shaped openings, in which operates a triangular shaft 25, which is mounted by pintles in line with its lower angle in bearings in the guides 22, and said shaft has arms 2627 secured to it.v To the outer end of the arm 26 is attached a wire rope or cable 28, eX- tending downward and secured at its lower end to a lever 29, pivotally mounted on a standard, which may be a side of the ladder 13. A spring is interposed between the base and the lever, tending to draw the rope or cable 28 down. The rear end of arm 26 has connected to it another rope or cable 31, likewise attached by its lower end to lever 29 on the opposite side of its pivot from the attachment of rope 28. The arm 27 is free and engages the outer end of a lever 34:, the rear end of which extends into the path of the weight or drop. Said lever has a spring 35 so arranged as to normally throw the outer end of' .its pintles the upper angles of said shaft act in a manner like cams upon the walls of the apertures 24 in the slides 21 and force the slides 21 and the pinion-shaft and pinion rearward to engage the latter with the rack 12. The rocking movement of shaft 25 is to such van extent that the operating upper angle of it, which produced the movement of the slide just described, has rocked down into the horizontal plane or thereabout of the pintles, and therefore effectually locks the slides against any return movement until the shaft shall be again rocked in the reverse direction. By this rocking movement also the arm 2'7 is swung outward, depressing the outer arm of lever 34 till it slips past the end thereof,when thespring 35 causes said outer arm of lever 34 to rise up into the circular path of the end of arm 27, and thereby prevent its return, and so hold the shaft 25 in its last-rocked position. The pinion 23 and rack 12 are now engaged, and the weight can be raised by giving proper movement to the sprockets 17 19 and chain 18. The weight rising to its maximum height, a lug 37, projecting from said weight, engages the rear end of lever 34, lifts it, and so disengages the outer end of it from the arm 27, whereupon spring 30 operates to draw down rope 28 and arm 26, rocking the shaft 25 forward and forcing the slides 21 in the same direction, disengaging the pinion 23 from the rack 12, whereupon the weight falls.

If it be desired to give the weight a halfstroke or any less than a full one, by drawing by the hand on rope 36the same depression and disengagement of the outer end of lever 34 is effected and the same disengagement of the pinion and rack. It is to be noticed that when the shaft 25 is rocked into the position shown in Fig. 3 it is locked in such position by the same features of structure as lock the pinion in engagement with the rack, as above described.

Engaging the lower portion of the guides 4, and as clearly shown in Fig. 6, are pileclamps, which are adjustable in the guides 4 and comprise slides 38, through which extend pointed screws 39, having operating-heads 40, and by means of which the pile may be centrally held in position in the recess 3, especially when starting to drive the same.

The device as heretofore set forth is especially convenient in its operation, and in addition to the normal weight of the drop 10 its speed of gravitation is increased by the added weight of the rack-barl2, connected thereto. All the parts will be made strong enough to resist strain and vibration and can be readily reached for rearrangement or other manipulation.

Having thus described the invention, what isclaimed as new is-- 1. In a pile-driver, the combination of a base-rest, upright guides thereon, a drop or weight movable in said guides and having a rack-barattached thereto, and an adjustablymounted pinion to alternately engage and disengage said rack-bar, substantially as and for the purposes specified.

2. In a pile-driver, the combination of a weight or drop having a rack-bar extending therefrom, a pinion to engage said rack-bar, slides carrying the said pinion,guides in which said slides are adjustable, an angular shaft mounted in said slides and having arms projecting therefrom, a locking-lever to engage one of said arms, and means for operating the 'said angular shaft and the pinion to cause an alternate connection and disconnection of said pinion with the raclebar, substantially as and for the purposes specified.

3. In a pile-driver, the combination of upright guides, a drop or weight movably mounted in said guides and having a rack-bar attached thereto, a sliding frame carrying a pinion adapted to be connected and disconnected from the said rack-bar, an angular shaft engaging the said sliding frame, arms carried by the said angular shaft, a spring-actuated locking-lever adapted to engage one of the said arms of the angular shaft, a spring-actuated operating-lever attached to the other arm on said shaft, a pull cord or rope attached to the arm to which the spring-actuated opcrating-lever is connected, and mechanism for operating the said pinion,substantially as and for the purposes specified.

4. In a pile-driver, the combination of upright guides, a drop or weight adj ustably mounted in said guides having a rack-bar extending therefrom, a cap on the guides supporting an antifrictional roller against which the rack-bar moves, a pair of slides on the said cap carrying a pinion adapted to be engaged with and disengaged from the said rack-bar, a triangular shaft for operating the said slides having arms thereon arranged at different angles, a locking-lever adapted to be operated by and engage one of the said arms, a springactuated operating-lever attached to the op posite ends of the other arm by two connections, a pull cord or rope attached to the said locking-lever, a lever at one side of the upper part of the frame carrying two dogs in connection therewith and engaged by one of the connections attached to one of the arms'on the triangular shaft and to the operating-lever, and mechanism for operating the several parts, substantially as and for the purposes specified.

5. In a pile driver, the combination of guides, a weight or drop adjustably mounted in said guides and having an arm projecting 628,962 r p s from one side thereof, a lever at the upper portion of one of the guides, a rack-bar attached to the weightor drop, an adjustable pinion to engage said rack-bar, and mechanism for operating the several parts, substantially as and for the purposes specified.

6. In a pile-driver, the combinationof a weight or drop having a rack-bar attached thereto, and a sliding pinion to be engaged with or disconnected from the said rack-bar, 10 substantially as and for the purposes specified.

In testimony whereof I have signed this specification in the presence of two subscribing Witnesses.

ABRAM G. SPEER.

\Vitnesses:

S. GARVER, L. E. JOHNSTON. 

